Bookmarklets | MOVABLE TYPE Global Positioning System (GPS) has been widely used in Vehicle Navigation Systems. It helps the users to determine the vehicle position or provides users with proper maneuver instruction.

GPS only gives the location, it's just a component of the system since it is unaware of the roads, paths or places. Map matching algorithms consist of using digital map data and GPS satellite signal to locate the vehicle on proper poison relative to digital map. The confontation between the absolute position and the digital map data, users could benefit from a nvaigation aid.